Question: "Was Mendel the guy who came up with Punnett squares?" -Kyle Nagel

Answer: Structures that have Capitalized names are usually named after the person who first described or came up with the device. In the case of Punnett squares, the guy was Reginald Crundall Punnett who published Mendalism in 1905. He was one of the first researchers to read Mendel's papers and did more work breeding peas and chickens and used his squares to show the possible allelic combinations.

Question: "Where to new corals get their symbiotic zooxanthellae from?" -Victoria Freeborn

Answer: Although they can be tugh to detect, there are free-living forms of zooxanthellae found in low densities in the water and in higher densities in the sediment, especially near reefs. Corals, both new and ones that have expelled their symbionts can become populated (or re-populated) when endodermal cells engulf the zooxanthellae. Not all corals have the symbionts. Some non-corals harbor the zooxanthellae as well.

Answer: Yes. There is a condition known as tomaculous neuropathy. A tomacula is a section of nerve axon that has too much myelin. This can put pressure on other nerve fibers and negatively affect their function casing numbness, tingling and cognative issues depending on where the tomacula is. The cause seems to be genetic.